Analysis
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max time kernel
144s -
max time network
126s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
26-05-2024 12:17
Behavioral task
behavioral1
Sample
XClient.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
XClient.exe
Resource
win10v2004-20240508-en
General
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Target
XClient.exe
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Size
39KB
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MD5
66f5cca568b2b83c23a69295ad2c643b
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SHA1
b822f0bcded0f587413d84f27eb2f5fdcdb48304
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SHA256
971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6
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SHA512
c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469
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SSDEEP
768:VG7+qmT8ztyh6pwDYvCL2v6hCuuJf27iJ1fFWPG9/hL6OOwhnjibH:4fmT8ztyh6pwDnKwCuuJfBFv9/hL6OO3
Malware Config
Extracted
xworm
5.0
127.0.0.1:54921
Zv7fhTadtKHCA29x
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Install_directory
%AppData%
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install_file
XClient.exe
Signatures
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Detect Xworm Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1516-1-0x0000000000120000-0x0000000000130000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\XClient.exe family_xworm behavioral1/memory/2028-37-0x0000000000F40000-0x0000000000F50000-memory.dmp family_xworm -
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 3000 powershell.exe 2476 powershell.exe 2996 powershell.exe 2504 powershell.exe -
Drops startup file 2 IoCs
Processes:
XClient.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk XClient.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk XClient.exe -
Executes dropped EXE 2 IoCs
Processes:
XClient.exeXClient.exepid process 2028 XClient.exe 1572 XClient.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
XClient.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe" XClient.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exeXClient.exepid process 2996 powershell.exe 2504 powershell.exe 3000 powershell.exe 2476 powershell.exe 1516 XClient.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exeXClient.exedescription pid process Token: SeDebugPrivilege 1516 XClient.exe Token: SeDebugPrivilege 2996 powershell.exe Token: SeDebugPrivilege 2504 powershell.exe Token: SeDebugPrivilege 3000 powershell.exe Token: SeDebugPrivilege 2476 powershell.exe Token: SeDebugPrivilege 1516 XClient.exe Token: SeDebugPrivilege 2028 XClient.exe Token: SeDebugPrivilege 1572 XClient.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
XClient.exepid process 1516 XClient.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
XClient.exetaskeng.exedescription pid process target process PID 1516 wrote to memory of 2996 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2996 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2996 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2504 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2504 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2504 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 3000 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 3000 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 3000 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2476 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2476 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2476 1516 XClient.exe powershell.exe PID 1516 wrote to memory of 2500 1516 XClient.exe schtasks.exe PID 1516 wrote to memory of 2500 1516 XClient.exe schtasks.exe PID 1516 wrote to memory of 2500 1516 XClient.exe schtasks.exe PID 2616 wrote to memory of 2028 2616 taskeng.exe XClient.exe PID 2616 wrote to memory of 2028 2616 taskeng.exe XClient.exe PID 2616 wrote to memory of 2028 2616 taskeng.exe XClient.exe PID 2616 wrote to memory of 1572 2616 taskeng.exe XClient.exe PID 2616 wrote to memory of 1572 2616 taskeng.exe XClient.exe PID 2616 wrote to memory of 1572 2616 taskeng.exe XClient.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\XClient.exe"C:\Users\Admin\AppData\Local\Temp\XClient.exe"1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1516 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2996
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2504
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3000
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2476
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"2⤵
- Creates scheduled task(s)
PID:2500
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C:\Windows\system32\taskeng.exetaskeng.exe {225C5A7D-BE52-46F6-B962-33D1EAAA0FC6} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2616 -
C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2028
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C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1572
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize7KB
MD52f36e71d27c1f122ac8148595f0610f9
SHA1aa7f5d1a8a9c384108c0a0d4aeeb2e9593524c48
SHA256663a1c580473650dda33efedec7e98d37a322b33b2a89f92a312ebc78ecdfb66
SHA5126b5a31c3aa51c096c1cfa4a890ffb0b57c74525d8750077785f1c29cdcdd4c0911784f539d9fbbfe0aafce4514ac1d5517d0b6063a83a6d2874c1fc89a7dbb9b
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Filesize
39KB
MD566f5cca568b2b83c23a69295ad2c643b
SHA1b822f0bcded0f587413d84f27eb2f5fdcdb48304
SHA256971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6
SHA512c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469
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MD5
d41d8cd98f00b204e9800998ecf8427e
SHA1da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e